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Answers: 3
Geography, 22.06.2019 14:40, thezbell
Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite
Answers: 2
Geography, 22.06.2019 18:00, shakkahdbwjsjs3068
How long does it take hair to grow 8 inches?
Answers: 2
Mathematics, 28.06.2019 18:30
Chemistry, 28.06.2019 18:30
Mathematics, 28.06.2019 18:30